Certified Rhythm Analysis Technician (CRAT) Practice Exam

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What type of artifact is indicated by a fuzzy baseline that is not thick?

Wandering baseline; dirty electrodes

AC interference; corroded leads

Somatic tremor; shivering

In the context of signal analysis, especially when dealing with measurements like an ECG or EEG, the appearance of a fuzzy baseline that lacks thickness typically signifies a summed effect from rapid muscle contractions. This phenomenon can occur due to somatic tremors, which are involuntary muscle contractions often caused by physical movements, such as shivering or muscle tension.

When these tremors happen, they can distort the otherwise clean signal, leading to this fuzzy appearance on the baseline. The key feature here is that the baseline remains relatively "thin," which distinguishes it from thicker artifacts associated with other issues, such as poor electrode contact or significant noise.

Understanding the characteristics of different artifacts is crucial for technicians and can aid in diagnosing the underlying causes of waveform distortions in clinical practice, ensuring accurate readings and patient assessments.

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This is not artifact

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